/// <summary>
/// Initializes a new instance of the <see cref="D2D1ArcSegment"/> struct.
/// </summary>
/// <param name="point">The end point of the arc.</param>
/// <param name="size">The x-radius and y-radius of the arc.</param>
/// <param name="rotationAngle">A value that specifies how many degrees in the clockwise direction the ellipse is rotated relative to the current coordinate system.</param>
/// <param name="sweepDirection">A value that specifies whether the arc sweep is clockwise or counterclockwise.</param>
/// <param name="arcSize">A value that specifies whether the given arc is larger than 180 degrees.</param>
public D2D1ArcSegment(D2D1Point2F point, D2D1SizeF size, float rotationAngle, D2D1SweepDirection sweepDirection, D2D1ArcSize arcSize)
{
this.point = point;
this.size = size;
this.rotationAngle = rotationAngle;
this.sweepDirection = sweepDirection;
this.arcSize = arcSize;
}
/// <summary>
/// Creates a scale transformation that has the specified scale factors and center point.
/// </summary>
/// <param name="size">The x-axis and y-axis scale factors of the scale transformation.</param>
/// <param name="center">The point about which the scale is performed.</param>
/// <returns>The new scale transformation.</returns>
public static D2D1Matrix3X2F Scale(D2D1SizeF size, D2D1Point2F center)
{
D2D1Matrix3X2F scale;
scale.m11 = size.Width;
scale.m12 = 0.0f;
scale.m21 = 0.0f;
scale.m22 = size.Height;
scale.m31 = center.X - (size.Width * center.X);
scale.m32 = center.Y - (size.Height * center.Y);
return(scale);
}
/// <summary>
/// Creates a scale transformation that has the specified scale factors.
/// </summary>
/// <param name="size">The x-axis and y-axis scale factors of the scale transformation.</param>
/// <returns>The new scale transformation.</returns>
public static D2D1Matrix3X2F Scale(D2D1SizeF size)
{
D2D1Matrix3X2F scale;
scale.m11 = size.Width;
scale.m12 = 0.0f;
scale.m21 = 0.0f;
scale.m22 = size.Height;
scale.m31 = 0.0f;
scale.m32 = 0.0f;
return(scale);
}
/// <summary>
/// Creates a translation transformation that has the specified x and y displacements.
/// </summary>
/// <param name="size">The distance to translate along the x-axis and the y-axis.</param>
/// <returns>A transformation matrix that translates an object the specified horizontal and vertical distance.</returns>
public static D2D1Matrix3X2F Translation(D2D1SizeF size)
{
D2D1Matrix3X2F translation;
translation.m11 = 1.0f;
translation.m12 = 0.0f;
translation.m21 = 0.0f;
translation.m22 = 1.0f;
translation.m31 = size.Width;
translation.m32 = size.Height;
return(translation);
}
